Nervous system

From Conservapedia

The nervous system is the set of neurons and support structures that process and organize information from the senses and bodily organs, analyze and coordinate appropriate responses and control the behavioral actions of an organism. All anatomical structures of the nervous system are made up of nervous tissue.

The nervous system is present in some form in all chordates with the the simplest system represented in the flatworms, which has two nerve cords running on opposite sides that connect to two simple brains called ganglia.